how long does your arm hurt after a b12 injection Shot Last In Body? Does Vitamin B12 Injection Hurt?

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Benefits of Vitamin B12 Injections Vitamin B12 injections may help support: Energy production Reduced fatigue Brain function Healthy nervous system Red blood cell production Mental focus Improved wellbeing Better metabolism Benefits vary depending on whether you have an underlying Vitamin B12 deficiency

What is Vitamin C

A simple blood test can determine if B12 deficiency is the culprit

So the practical takeaway is not oral is better or SC is better. It is: pick one route, follow the documented per-dose figure for the vial you have, and keep the route constant so that whatever you observe is not confounded by a mid-stream route change